The Universe

7. The galaxy where our solar system is located.
10. A very large group of stars.
11. The ___________ needed to predict the flow of the river.
14. He was the first to use telescopes systematically to study the universe.
15. Device launched into the space to orbit to study the universe.
16. A group of stars that form a pattern in the sky.
17. Spacecraft build to take astronauts to and from space.
18. They originate with nebulae.

1. ____________ knew about constellations when he navigated to America.
2. The Big Bang Theory is a _________ about how the universe was created.
3. A large cloud of dust with vast quantities of hydrogen where stars originate.
4. People have observed the ____________ since Antiquity.
5. The ___________ had temples aligned with the Sun.
6. It's what you can see in the universe:stars, galaxies, etc.
8. It's about 70% of the universe.
9. It's around 25% of the universe, material that can't be observed.
12. An optical instrument used to make distant objects appear nearer.
13. The ___________ are referred to as the fathers of the astronomy.